<template>
  <!--使用v-if判断goods_info是否为空，不为空时渲染页面-->
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!--轮播图区域-->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
        <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    <!--商品信息区域-->
    <view class="goods-info-box-d">
      <!--商品价格-->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!--商品信息主题区域-->
      <view class="goods-info-body">
        <!--左侧商品名-->
        <view class="goods-name-d">{{goods_info.goods_name}}</view>
        <!--右侧收藏按钮-->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!--运费-->
      <view class="yf">
        快递：免运费    <!-- -- {{cart.length}} -->
      </view>
    </view>
    <!--rich-text富文本标签的nodes属性可以将字符串渲染成HTML的标签-->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!--商品导航组件区域-->
    <view class="goods-nav">
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import { mapState, mapMutations,mapGetters } from 'vuex'
  export default {
    computed: {
      //通过模块路径映射需要的成员到指定页面
      ...mapState('m_cart', []),
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
    //   total(newVal) {
    //     const findResult = this.options.find(x => x.text === '购物车')
    //     if(findResult) {
    //       findResult.info = newVal
    //     }
    //   }    //此种方法仅在页面初次加载时生效，须更换其他方法
      total: {
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if(findResult) {
            findResult.info = newVal
          }
        },
        immediate: true
      }
    },
    data() {
      return {
        //商品详情对象
        goods_info: {},
        options: [{
        			icon: 'shop',
        			text: '店铺',
        			infoBackgroundColor:'#007aff',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    },
              ]
      };
    },
    onLoad(options) {
      //console.log(options)
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id) {
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id: goods_id})
        if(res.meta.status !== 200) return uni.$showMsg()
        
        //当成功获取数据后不要立刻放入对象，先进行修改
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ').replace(/webp/ /g, 'jpg')
        this.goods_info = res.message
      },
      preview(i) {
        //uni自带图片预览组件
        uni.previewImage({
          //预览时默认显示图片的索引
          current: i,
          //map()一种创建数据的函数
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onclick(e) {
        //console.log(e)
        if(e.content.text === '购物车') {
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        //console.log(e)
        if(e.content.text === '加入购物车') {
          //组织商品的信息对象
          // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          
          //调用addToCart方法
          this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;
    
    image {
      width: 100%;
      height: 100%;
    }
  }
  
  .goods-info-box-d {
    padding: 10px;
    padding-right: 0;
    
    .price {
      color: #C00000;
      font-size: 18px;
      margin: 10px 0;
    }
    
    .goods-info-body {
      display: flex;
      justify-content: space-between;
      
      .goods-name-d {
        font-size: 13px;
        margin-right: 10px;
      }
      
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }
    
    .yf {
      font-size: 12px;
      color: gray;
      margin: 10px 0;
    }
  }
  
  .goods-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }
  
  .goods-detail-container {
    padding-bottom: 50px;
  }
</style>
